期刊
POLYMER TESTING
卷 90, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2020.106714
关键词
Chitosan; Glycerol plasticizer; Electrical properties; Impedance; EDLC
资金
- Ministry of Higher Education and Scientific Research-Kurdish National Research Council (KNRC), Kurdistan Regional Government/Iraq
- University of Sulaimani
- Komar University of Science and Technology
Plasticized biopolymer electrolytes based on chitosan (CS) doped with magnesium acetate (Mg(CH3COO)(2)) and various amounts of glycerol have been prepared for energy storage electrochemical double-layer capacitor (EDLC) application. In this work the dielectric and electrochemical properties have been examined using electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and linear sweep voltammetry (LSV). It is confirmed from the frequency changing of the impedance spectra that relatively high dielectric constant has been recorded at low frequency region. From tan S and M spectra, relaxation peaks are clearly seen. It has been found that as the glycerol concentration increased, the DC conductivity increases. In the fabricated system (CS: Mg (CH3COO)(2): glycerol.), ions are responsible for charge carrying as the ion transference number is higher than the electron transference number. The electrochemical stability of the system extends to 2.4 V as shown in the LSV. The mechanism of the charge storage has been investigated and indicated that the non-Faradaic dominates where the specific capacitance is significantly affected by scan rate. The fabricated EDLC possessed a constant value of specific capacitance (78.2 F/g), energy density (8.8 Wh/kg), and ESR (78.2 F/g). The EDLC has an tremendous cycleability as high number of Columbic efficiency has accomplished. The value of efficiency of the EDLC has been in the range of 97%-99%.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据